Chin guard



FIG. 1 is a top perspective view of a chin guard showing my new design;

FIG. 2 is a front elevation view thereof;

FIG. 3 is rear elevation view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a bottom plan view thereof;

FIG. 6 is a side elevation view thereof; and,

FIG. 7 is an opposite side elevation view thereof.

In the drawings, the broken lines shown on the chin guard and the broken lines shown extending outwardly from the chin guard depict portions of the design that form no part of the claim. 

CLAIM The ornamental design for a chin guard, as shown and described. 